+- 6.5 Grendel Forum (https://65grendel.com)
+-- Forum: 6.5 GRENDEL DISCUSSION FORUMS (https://65grendel.com/forumdisplay.php?fid=3)
+--- Forum: 6.5 Grendel Troubleshooting (https://65grendel.com/forumdisplay.php?fid=15)
+--- Thread: bullet tumbleing isues.. (/showthread.php?tid=553)
bullet tumbleing isues.. - BJIvory - 05-30-2011
new build is making bullets tumble. any help would be greatly appreciated!
i have never put together and AR that didn't just run. so this is new ground for me.
for the build i used a Black Hole Weaponry barrel 1x9
the load that i used is 36grs of H335, 120gr Vmax, hornady brass, Winchester primer.
thanks again!
bullet tumbleing isues.. - Drifter - 05-30-2011
I would verify the twist rate using a patch and cleaning rod.
Also, check chambered unfired rounds for possible damage to bullets during feeding process.
bullet tumbleing isues.. - toolsofthetrade - 05-30-2011
got a muzzle device on the rifle?
bullet tumbleing isues.. - BJIvory - 05-30-2011
Drifter Wrote:I would verify the twist rate using a patch and cleaning rod.
Also, check chambered unfired rounds for possible damage to bullets during feeding process.
twist rate checks out. there is some copper fowling that looks kind of jagged at the muzzle end that is still remaining after bushing and cleaning the bore. ?
i did rwack some loaded ammo though the thing before i shot at the range and there was only small scratches form the barrel extension on the bullets.
bullet tumbleing isues.. - BJIvory - 05-30-2011
toolsofthetrade Wrote:got a muzzle device on the rifle?
not yet. its on back order...
bullet tumbleing isues.. - longdayjake - 06-06-2011
Pictures of the muzzle?
bullet tumbleing isues.. - bwaites - 06-06-2011
BJIvory Wrote:new build is making bullets tumble. any help would be greatly appreciated!
i have never put together and AR that didn't just run. so this is new ground for me.
for the build i used a Black Hole Weaponry barrel 1x9
the load that i used is 36grs of H335, 120gr Vmax, hornady brass, Winchester primer.
thanks again!
36 grains! Are you sure on that? I didn't think you could come close to 36 grains.
bullet tumbleing isues.. - StoneTower - 06-06-2011
bwaites Wrote:36 grains! Are you sure on that? I didn't think you could come close to 36 grains.
36 gr of H-335???? Wow...I am not sure if he can get 36 grains in a case, but if he has managed to do it, that would be one hot load. PA_ALLEN uses 30.0 gr to get 2765 fps out of a Barnes 100gr TTSX. (I killed my pig with this load.) PA_ALLEN uses 28.5 gr to get 2395 fps out of a Nosler 12gr BT. Those are loads he posted. Start low and work up.
I hope that the 36gr reference is a typo. With 30 grains in the case, there is definitely more room and if the OP compressed the load, 36gr may be a real number. Not a safe number, but it may be a real number. Be careful guys...you are dealing with very high pressure and metal that is next to your face and fingers. Be safe and live to hunt/shoot another day. You are not baking a cake. If something goes wrong you don't usually have the luxury of just dumping it in the trash and starting over.
Take Care,
David
bullet tumbleing isues.. - bwaites - 06-06-2011
But if it is 36 grain, those bullets are probably not tumbling, they're being torn apart! LOL!!
bullet tumbleing isues.. - StoneTower - 06-06-2011
Better the bullets than the gun.
bullet tumbleing isues.. - steel89 - 06-06-2011
Loads recommended should be from a reliable source. Be careful.
bullet tumbleing isues.. - bwaites - 06-06-2011
steel89 Wrote:loads recommended by dr. Kevorkian?
roflmao!!!
bullet tumbleing isues.. - glane5910 - 06-19-2011
Well, #1, there isn't a 120gr Vmax that I've seen, they are 95 gr. How long is the bbl? Very doubtful getting 36grs in that case. IIRC, 32grs of TAC was about over full. The MAX load for the 95gr Vmax with H-335 is 31.2 grs and the breech pressure is around 50,200 PSI. If he's actually getting that much powder in there, then the bullets may just be coming apart from the twist rate and velocities. Those bullets will take some abuse and stay together but ....
bullet tumbleing isues.. - toolsofthetrade - 06-20-2011
shot some 95gr vmaxes today out of my BHW barrel, mine were loaded to 2.247 COAL and went from 28.5gr up to 30.5, 30.5 was showing flattened primers (not bad though) with 29.5 giving me my best group of the day at .7 "
bullet tumbleing isues.. - glane5910 - 06-20-2011
OAL of my 95gr Vmax are 2.190". Same as in AA data. largest group so far is 0.417". I'm using 30.8grs of Ramshot Xterminator. Gets me 2874 FPS from my 18"